[dpdk-dev] [PATCH v12 08/11] net/ixgbe: implement power management API

[Anatoly Burakov]

From: Liang Ma <liang.j...@intel.com>

Implement support for the power management API by implementing a
`get_monitor_addr` function that will return an address of an RX ring's
status bit.

Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
Signed-off-by: Liang Ma <liang.j...@intel.com>
Acked-by: Konstantin Ananyev <konstantin.anan...@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c |  1 +
 drivers/net/ixgbe/ixgbe_rxtx.c   | 25 +++++++++++++++++++++++++
 drivers/net/ixgbe/ixgbe_rxtx.h   |  1 +
 3 files changed, 27 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 9a47a8b262..4b7a5ca60b 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -560,6 +560,7 @@ static const struct eth_dev_ops ixgbe_eth_dev_ops = {
        .udp_tunnel_port_del  = ixgbe_dev_udp_tunnel_port_del,
        .tm_ops_get           = ixgbe_tm_ops_get,
        .tx_done_cleanup      = ixgbe_dev_tx_done_cleanup,
+       .get_monitor_addr     = ixgbe_get_monitor_addr,
 };
 
 /*
diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 6cfbb582e2..7e046a1819 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -1369,6 +1369,31 @@ const uint32_t
                RTE_PTYPE_INNER_L3_IPV4_EXT | RTE_PTYPE_INNER_L4_UDP,
 };
 
+int
+ixgbe_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc)
+{
+       volatile union ixgbe_adv_rx_desc *rxdp;
+       struct ixgbe_rx_queue *rxq = rx_queue;
+       uint16_t desc;
+
+       desc = rxq->rx_tail;
+       rxdp = &rxq->rx_ring[desc];
+       /* watch for changes in status bit */
+       pmc->addr = &rxdp->wb.upper.status_error;
+
+       /*
+        * we expect the DD bit to be set to 1 if this descriptor was already
+        * written to.
+        */
+       pmc->val = rte_cpu_to_le_32(IXGBE_RXDADV_STAT_DD);
+       pmc->mask = rte_cpu_to_le_32(IXGBE_RXDADV_STAT_DD);
+
+       /* the registers are 32-bit */
+       pmc->data_sz = sizeof(uint32_t);
+
+       return 0;
+}
+
 /* @note: fix ixgbe_dev_supported_ptypes_get() if any change here. */
 static inline uint32_t
 ixgbe_rxd_pkt_info_to_pkt_type(uint32_t pkt_info, uint16_t ptype_mask)
diff --git a/drivers/net/ixgbe/ixgbe_rxtx.h b/drivers/net/ixgbe/ixgbe_rxtx.h
index 6d2f7c9da3..8a25e98df6 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.h
+++ b/drivers/net/ixgbe/ixgbe_rxtx.h
@@ -299,5 +299,6 @@ uint64_t ixgbe_get_tx_port_offloads(struct rte_eth_dev 
*dev);
 uint64_t ixgbe_get_rx_queue_offloads(struct rte_eth_dev *dev);
 uint64_t ixgbe_get_rx_port_offloads(struct rte_eth_dev *dev);
 uint64_t ixgbe_get_tx_queue_offloads(struct rte_eth_dev *dev);
+int ixgbe_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc);
 
 #endif /* _IXGBE_RXTX_H_ */
-- 
2.17.1